Comparison of UV-B tolerance between wild-type and albino Japanese flounder Paralichthys olivaceus juveniles

Yuichi Fukunishi; Reiji Masuda; Tadahisa Seikai; Mitsuo Nakamura; Masatomo Tagawa; Yoh Yamashita

doi:10.11233/aquaculturesci.65.149

Short Paper

Comparison of UV-B tolerance between wild-type and albino Japanese flounder Paralichthys olivaceus juveniles

Yuichi Fukunishi, Reiji Masuda, Tadahisa Seikai, Mitsuo Nakamura, Masatomo Tagawa, Yoh Yamashita

Author information

Keywords: Japanese flounder, pigmentation, chromatophore, melanin

JOURNAL FREE ACCESS

2017 Volume 65 Issue 2 Pages 149-152

DOI https://doi.org/10.11233/aquaculturesci.65.149

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Abstract

Albinos in Japanese flounder Paralichthys olivaceus are yellowish mutants which lack melanophores. To reveal the function of melanophores, UV-B tolerance was compared between wild-type (100±8 mm) and albino (98±6 mm) flounder juveniles. After 6 hours of UV-B exposure (1.1 W/m²), survival was examined every 1 hour for 24 hours. Control treatment without UV exposure was also conducted. Albino fish in the UV treatment showed significantly lower survival than that of wild-type fish. There was no significant difference in survival between strains in the control. Present research suggests that melanophores have a UV photoprotective function in flounder juveniles.

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